trie_multiple_search.cpp File Reference

Trie datastructure with search variants More...

#include <algorithm>
#include <cassert>
#include <cctype>
#include <cstring>
#include <iostream>
#include <queue>

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Classes
class	operations_on_datastructures::trie_operations::Tnode
	Class defining the structure of trie node and containing the methods to perform operations on them. More...

Namespaces
namespace	operations_on_datastructures
	for std::vector
namespace	trie_operations
	Functions for Trie datastructure implementation.

Functions
static void	test ()
	Function to test a simple search before and after deleting an entry. And to test out the multiple variants of search.
int	main (int argc, char const *argv[])
	Main function.

Detailed Description

Trie datastructure with search variants

This provides multiple variants of search functions on a trie structure utilizing STL. The trie is valid for only English alphabets.

Author

Ghanashyam

Function Documentation

main()

int main	(	int	argc,
		char const *	argv[] )

Main function.

Parameters

argc	commandline argument count (ignored)
argv	commandline array of arguments (ignored)

Returns

0 on exit

                                       {
    test();  // run self-test implementations
    return 0;
}

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test()

static void test ( )

static

Function to test a simple search before and after deleting an entry. And to test out the multiple variants of search.

                   {
    auto root = new operations_on_datastructures::trie_operations::Tnode();
    std::vector<std::string> inputs = {
        "abcde", "sss",    "ssss",  "ssst", "sssu", "sssv",
        "sst",   "ssts",   "sstt",  "sstu", "tutu", "tutuv",
        "tutuu", "tutuvs", "tutus", "tvst", "tvsu", "vvvv"};
 
    for (auto &i : inputs) {
        root->Insert(i);
    }
    // Search an existing entry
    assert(root->SearchPresence("vvvv"));
    std::cout << root->SearchPresence("vvvv") << std::endl;
    // Delete it
    root->Delete("vvvv");
    // Search for the entry again
    assert(!root->SearchPresence("vvvv"));
    std::cout << root->SearchPresence("vvvv") << std::endl;
 
    std::cout << root->SearchPresence("tutu") << std::endl;
    root->SearchSuggestions("tutu");
    std::cout << root->SearchPresence("tutu") << std::endl;
 
    root->SearchSuggestions("tutuv");
    std::cout << root->SearchPresence("tutuv") << std::endl;
 
    root->SearchSuggestions("tutuvs");
 
    root->SearchFreqSuggestions(
        "tu");  // The top 3 frequent entries with prefix tu are tutu, tutuv &
                // tutuvs respectively
    root->SearchSuggestions(
        "");  // Empty search to list all the entries in the trie
}

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